Answer to Question #140792 in Inorganic Chemistry for Sarita bartwal

Question #140792
State hund's rule and give justification for it.
Expert's answer

Hund's Rule states that; Every orbital in a sub-shell is singly occupied with one electron before any one orbital is doubly occupied, and all electrons in singly occupied orbitals have the same spin (to maximize total spin)

  • The justification for this rule is to tell how the electrons in an atom should be placed into degenerate orbitals.
  • It is also used to determine the ground state of an atom or molecule.
  • Can also fairly predict the lowest state of a given excitation electronic configuration.
  • Hund's rule therefore corrects the problem that would be experienced by Aufbau Principle when it comes to the different 2p orbitals , regarding the order of filling the orbitals with electrons.

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